Brawl.io Switch Nsp (eshop) 〈100% NEWEST〉

Supports local multiplayer, which is a huge upgrade over the mobile/web versions. 3. Hole.io

It combines the "get big to win" mechanic of io games with Nintendo’s signature polish. 5. Boomerang Fu Brawl.io Switch NSP (eShop)

Be cautious of third-party sites offering NSP downloads; these often contain malware or can lead to your Nintendo account being banned from online services. Supports local multiplayer, which is a huge upgrade

"NSP" refers to the digital package format for Nintendo Switch games. Supports local multiplayer

While not strictly an "io" game, it captures the one-hit-kill, fast-respawn chaos of the genre. You play as adorable food items armed with boomerangs, fighting in top-down arenas.